Know Your Horsepower.
Know Your Edge.
Real-time density altitude calculations that show you exactly how atmospheric conditions affect your engine's performance. Stop guessing. Start winning.
See Your Local Conditions
Enable location to calculate your current density altitude and horsepower impact.
Your Power Changes With The Weather
Atmospheric conditions directly impact engine output. The same car can perform vastly different on different days—and most racers are just guessing.
Temperature
Hot air is less dense, reducing oxygen available for combustion
Altitude
Higher elevation means lower atmospheric pressure
Humidity
Water vapor displaces oxygen in the air mixture
Barometric Pressure
Low pressure systems reduce air density significantly
Everything You Need to Dominate
Professional-grade atmospheric analysis tools designed for racers, by racers.
Real-Time Density Altitude
Instant DA calculations based on your current location's atmospheric conditions.
Location-Based Weather
Automatic GPS detection fetches live weather data from professional-grade sources.
24-Hour Forecast
Plan your race day with hourly density altitude predictions and HP impact forecasts.
Manual Calculator
Input custom values for temperature, pressure, humidity, and elevation for any scenario.
6 Correction Standards
SAE J1349, SAE J607, DIN 70020, ISO 1585, EEC 80/1269, and JIS D 1001 support.
iOS Widgets
Lock screen and home screen widgets for instant density altitude at a glance.
Multi-Location Tracking
Save unlimited locations to monitor conditions at your favorite tracks.
Data Export
Export your data to CSV for analysis, tuning logs, and record keeping.
Simple as 1-2-3
No complex setup. No manual data entry. Just open and know.
Open the App
AIR POWER automatically detects your location and fetches current weather conditions from professional-grade sources.
See Your Numbers
Instantly view density altitude, relative horsepower, air density percentage, and all the metrics that matter for your tune.
Plan Your Race
Check the forecast to find the optimal time to run. Know exactly when conditions favor peak performance.
Try It Right Now
No download required. Use our web calculator for free.
Simple, Transparent Pricing
Start free, upgrade when you're ready for more power.
Free
Everything you need to get started
- Real-time density altitude
- Current weather conditions
- 12-hour forecast
- Manual calculator
- SAE J1349 correction factor
- 1 saved location
- 2 days daily outlook
- 24-hour forecast
- All 6 correction standards
- Unlimited locations
- Data export (CSV)
Pro
For serious racers who want every edge
- Everything in Free
- 24-hour forecast
- 10+ days daily outlook
- All 6 correction standards
- Unlimited saved locations
- Instant refresh (no cooldown)
- Data export (CSV)
- Priority support
- Smart alerts
Frequently Asked Questions
Everything you need to know about density altitude and AIR POWER.